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The lack of a complete autopsy and potential tampering of key prosecution evidence will be among the key points raised in the appeal of an Australian resident found guilty of murdering her friend with a cyanide-laced coffee.

When Jessica Kumala Wongso was found guilty by a Jakarta court last week and sentenced to 20 years in prison, her lawyer Otto Hasibuan turned to her and told her not to cry.

He was worried, he told AAP, that her tears would be used against her at a later date.

During the verdict the three Jakarta court judges spoke at length about what they described as the 28-year-old's staged demeanour - saying her crying had not been "pure" with "no liquid dripping from the mouth".

In his 34 years practising law, Mr Hasibuan said he had never experienced a verdict like it.

"How can they say what she feels," he said.

"The reason why the people are so interested in this case is because it's already felt by the people of Indonesia that they don't receive justice."

Wongso's legal team lodged an appeal memo stating their intention to challenge the verdict on Friday and are now awaiting a complete version of the court's findings before preparing a full statement.

Following a highly-publicised trial that spanned more than four months, Wongso was found guilty on Thursday of murdering her friend Wayan Mirna Salihin with a cyanide-laced coffee at Jakarta's Olivier cafe on January 6. The pair had studied together at Sydney's Billy Blue design college.

Among the key points Wongso's appeal is expected to focus on was the failure to carry out a full autopsy on Mirna and the alleged lack of consideration of defence expert forensic testimony by the judges.

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Mirna's family had objected to a full autopsy being carried out on religious grounds, so her stomach, liver and urine were the only things that were tested. While prosecutors said 298mg of cyanide was discovered in the coffee after Mirna's death, a test of her stomach 70 minutes after she died showed no traces of the poison.